Although引导让步状语从句，是可以和though互换, 意为尽管……但是……
despite后面只能接短语，接词语，
Despite the heavy rain, we still go out.
We still go out although/though it rsins heavily.
但是though和Although使用还是有区别，固定结构，
名词/形容词/副词加as/though加主语加谓语
但是这个时候只能用though
Boy though/as he is, he likes knitting.